Provides full adjustability to each digit. Made of high-density foam with a malleable metal frame. D-ring hook straps can be attached directly onto the soft material covering. Ideal for persons with mild to moderate tone and for tightness or contractures that vary among fingers. Unlike other ball-style splints, the Progress(tm) I.F. Ball Splint provides full adjustability at the fingers, wrist and along the entire length of the forearm. Includes three straps with matching D-ring buckles and Velcro(r) strap tabs. An I.F. Separator is included for optimal fit and security. To size, measure across the MP joints.Small/Medium:2-1/2in to 3-1/2in (6.4 to 8.9cm)Medium/Large:3-1/2in to 4-1/2in (8.9 to 11cm)